Let’s be honest with each other: There aren’t any brick-and-mortar companies today that are similar to what Wal-Mart Stores Inc. (NYSE: WMT) was in 1970 — that’s just not how the world works anymore. That said, there are companies out there that have similar advantages to those Wal-Mart enjoyed in its younger days, and could provide similarly powerful long-term wealth generation to investors who buy in now.